room = mr->headroom;
	...

	if (chunk_size < XDP_UMEM_MIN_CHUNK_SIZE || chunk_size > PAGE_SIZE) {
		/* Strictly speaking we could support this, if:
		 * - huge pages, or*
		 * - using an IOMMU, or
		 * - making sure the memory area is consecutive
		 * but for now, we simply say "computer says no".
		 */
	
		return -EINVAL;
	}
	...
}

The problem is exactly the overflow.[lvc-project] [PATCH net] xsk: Fix overflow in descriptor validation@@Ilia Gavrilov <Ilia.Gavrilov@infotecs.ru> undefinedMagnus Karlsson <magnus.karlsson@gmail.com>, Alexander Lobakin <aleksander.lobakin@intel.com> undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefinedŠƒ…R